From: Nikita Danilov <Nikita@Namesys.COM>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Linux Kernel Mailing List <Linux-Kernel@Vger.Kernel.ORG>
Subject: Re: kernel thread exit race
Date: Wed, 7 Aug 2002 14:05:22 +0400 [thread overview]
Message-ID: <15696.61666.452460.264138@laputa.namesys.com> (raw)
In-Reply-To: <1028719111.18156.227.camel@irongate.swansea.linux.org.uk>
Alan Cox writes:
>
> On Wed, 2002-08-07 at 10:22, Nikita Danilov wrote:
> > Hello,
> >
> > what is the politically correct way to exit from a kernel thread daemon
> > without module unload races?
>
> You probably want to use completions. There is a function in the kernel
> core "complete_and_exit" which does both the complete() and then the
> exit() so that after complete finishes the task will not re-enter
> modulespace and risk an unload race
>
Ah I see, thank you and Russell. But this depends on no architecture
ever accessing spinlock data after letting waiters to run, otherwise
there still is (tiny) window for race at the end of complete() call,
right?
>
Nikita.
next prev parent reply other threads:[~2002-08-07 10:01 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-07 9:22 Nikita Danilov
2002-08-07 9:38 ` Russell King
2002-08-07 11:18 ` Alan Cox
2002-08-07 10:05 ` Nikita Danilov [this message]
2002-08-07 12:11 ` Alan Cox
2002-08-07 11:30 ` Nikita Danilov
2002-08-07 12:12 ` Russell King
2002-08-07 13:22 ` Alan Cox
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